LUA Failed to reach Distribution Center

I recently Upgraded from LUA 2.3.0.71 to 2.3.1.82 .It was upgraded fine however now it is not able to distribute updates .I have two distribution centers .One is default Production center and other is default testing center which is blank.The testing distribution center is working fine where as the production dist. center is not reachable ,even though it is on the same machine .Please note that I am using Port 8080 instead of default port 7070 and the Production distribution Center was working fine before the Upgrade .

I have checked the log files and did not find any error which can help me understand the reason .Kindly See the attachments and provide your opinion .

I am also receiving this error. Before upgrading to 2.3.2.99, the distribution center worked fine. It is not going through proxy, the connection to source server is going through proxy but that is connecting fine.